CBJ Finishing and Polishing 3

Question 1

In a standard finishing sequence, which step comes FIRST?

Accepted Answer

Filing and sanding with progressively finer abrasive papers

Answer

The finishing sequence always begins with mechanical abrasion — filing and sanding — to remove tool marks and scratches before any compound work begins.

Question 2

What is 'planishing' in metalworking?

Accepted Answer

Smoothing and work-hardening metal using a polished hammer on a steel mandrel or stake

Answer

Planishing uses a highly polished, flat-faced hammer to refine and smooth a metal surface while simultaneously work-hardening it, often as a final shaping step.

Question 3

What technique is most commonly used to create an 'antiqued' or 'oxidized' look on sterling silver?

Accepted Answer

Using liver of sulfur or other oxidizing agents on the surface

Answer

Liver of sulfur (potassium polysulfide) reacts with silver to form a dark silver sulfide layer, which is then selectively removed from raised areas to create an antique effect.

Question 4

What is the primary danger of over-polishing prong tips on a ring?

Accepted Answer

The prongs may become too thin and weak, risking loss of the gemstone

Answer

Excessive polishing removes metal from the prong tips, making them too thin to securely hold the stone, which creates a significant risk of stone loss.

Question 5

Which abrasive tool is most effective for finishing the inside surface of a ring band?

Accepted Answer

A tapered spindle, split lap, or ring-inside tool sized to fit inside the band

Answer

Tapered spindle burs or split lap wheels sized appropriately for the ring's inside diameter can reach and finish the inner surface of the band effectively.

(CBJ) Certified Bench Jeweler Practice Test

(CBJ) Certified Bench Jeweler Practice Test

CBJ Finishing and Polishing 3